Photonic chirp rates estimator for piecewise linear frequency modulated waveforms based on photonic self-fractional Fourier transform

Release time:2023-05-08  Hits:

• DOI number:10.1364/OE.394407
• Journal:OPTICS EXPRESS
• Abstract:This paper reports a photonic chirp rates estimator for the piecewise linear frequency modulated waveforms (PLFMWs). The estimator is based on the photonic self-fractional Fourier transform (FrFT) by utilizing the input PLFMW as the transform kernel. In this way, the self-FrFT operation can be finished with short latency time and the chirp rates of all LFM sub-pulses can be retrieved according to their fractional frequencies. In experiment, the chirp rates estimation of a four-stage PLFMW is performed. The measurement range from -964.47 GHz/mu s to 50.76 GHz/mu s with resolution of 0.0518 GHz/us is demonstrated for the experimental system. And the absolute measurement error within +/- 0.06 GHz/mu s and the relative measurement error less than 2% is also obtained. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
• First Author:Han, Guanyu, Li, Shangyuan, Xue, Xiaoxiao, Zheng, Xiaoping
• Indexed by:J
• Document Type:Article
• Volume:28
• Issue:15
• Page Number:21783
• ISSN No.:1094-4087
• Translation or Not:no